Gas separation – Two or more separators – Plies or layers of different characteristics or orientation
Patent
1994-06-06
1996-01-23
Spitzer, Robert
Gas separation
Two or more separators
Plies or layers of different characteristics or orientation
55523, 55DIG30, 55DIG42, B01D 3920
Patent
active
054862205
ABSTRACT:
An exhaust gas purification filter comprising a metal porous body obtained by packing and fixing metal fibers having a mean fiber diameter of 5 to 40 .mu.m or heat resistant ceramic fibers having a mean fiber diameter of 1 to 40 .mu.m in a dispersed state into pores of a foamed structure porous body made of a heat-resistant metal so that a packing density of the resulting metal porous body is from 5 to 20%. The filter may be in a laminated structure by laminating the foregoing foamed structure porous body filled with or without the metal or ceramic fibers and a fiber structure porous body obtained by fixing metal fibers having a mean diameter of 5 to 40 .mu.m or heat-resistant ceramic fibers having a mean diameter of 1 to 40 .mu.m in a dispersed state so that a packing density is from 5 to 25% are laminated. By using the inventive filter for collecting PM (dry soot, fine particles and SOF) contained in an exhaust gas of a Diesel engine, a pressure loss for the exhaust gas is minimized while high collection efficiency is kept.
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Patent Abstracts Of Japan, vol. 16 No. 311 (M-1277); Jul. 8, 1992 JPA-4-86, 313; Mar. 18, 1992.
Patent Abstracts of Japan, vol. 17 No. 303 (C-1069); Jun. 10, 1993 JPA-5-23, 511; Feb. 2, 1993.
Honda Masaaki
Ihara Tomohiko
Bierman Jordan B.
Spitzer Robert
Sumitomo Electric Industries Ltd.
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